Update Dockerfile

Dockerfile

@@ -1,8 +1,27 @@
+#################### builder stage ####################
+FROM python:3.9-slim AS builder
+WORKDIR /build
+
+COPY requirements.txt .
+RUN pip install --prefix=/install -r requirements.txt
+
+COPY app.py .
+RUN python -m compileall -b -f app.py
+RUN tar -C /build -czf /build/app.tgz app.pyc
+
+#################### final stage ####################
 FROM python:3.9-slim
 WORKDIR /app
-# deps only
-COPY --from=builder /install /usr/local
+
+# 1. Install dependencies
+COPY --from=builder /install /usr/local/
+
+# 2. Copy the bytecode tarball into writable /tmp
+COPY --from=builder /build/app.tgz /tmp/app.tgz
+
+# 3. Add entrypoint
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
+
 EXPOSE 7860
 ENTRYPOINT ["/entrypoint.sh"]